| POS | Rank | Heat | BIB | ATHLETE | COUNTRY | RESULTS | ms* | WIND | 
|---|---|---|---|---|---|---|---|---|
| 1 | 1 | 1 | 296 | Charles DOBSON |  GBR | 20.53 Q PB | -0.6 | |
| 2 | 1 | 3 | 297 | Jona EFOLOKO |  GBR | 20.74 Q | -0.3 | |
| 3 | 1 | 2 | 651 | Khance Meyers |  USA | 20.79 Q | +0.4 | |
| 4 | 2 | 1 | 121 | Zane BRANCO |  AUS | 20.81 Q | -0.6 | |
| 5 | 3 | 1 | 586 | Henrik LARSSON |  SWE | 20.85 q PB | -0.6 | |
| 6 | 2 | 3 | 645 | Eric HARRISON JR. |  USA | 20.86 Q | -0.3 | |
| 7 | 2 | 2 | 245 | Pol RETAMAL |  ESP | 20.91 Q | +0.4 | |
| 8 | 4 | 1 | 321 | Milo SKUPIN-ALFA |  GER | 20.96 q | -0.6 | |
| 9 | 3 | 3 | 494 | Onyema ADIGIDA |  NED | 21.10 | -0.3 | |
| 10 | 3 | 2 | 406 | Lorenzo PATTA |  ITA | 21.18 | +0.4 | |
| 11 | 5 | 1 | 541 | Abdelaziz MOHAMED |  QAT | 21.20 | -0.6 | |
| 12 | 4 | 3 | 444 | Koki UEYAMA |  JPN | 21.24 | -0.3 | |
| 13 | 6 | 1 | 443 | Keigo YASUDA |  JPN | 21.28 | -0.6 | |
| 14 | 4 | 2 | 585 | Kasper KADESTÃ…L |  SWE | 21.30 | +0.4 | |
| 15 | 5 | 2 | 381 | Aaron Sexton |  IRL | 21.33 | +0.4 | |
| 16 | 7 | 1 | 231 | Juan González |  ESP | 21.36 | -0.6 | |
| 17 | 8 | 1 | 672 | Dickson Clever Kapandura |  ZIM | 21.37 | .364 | -0.6 | 
| 18 | 6 | 2 | 529 | Bartosz Zieliński |  POL | 21.37 | .367 | +0.4 | 
| 19 | 5 | 3 | 208 | Daniel Vejražka |  CZE | 21.45 | -0.3 | |
| 20 | 7 | 2 | 595 | Timothy FREDERICK |  TTO | 21.48 | +0.4 | |
| 21 | 6 | 3 | 579 | William REAIS |  SUI | 21.51 | -0.3 | |
| 22 | 7 | 3 | 472 | Ahmed Omar Jumah |  KSA | 21.58 | -0.3 | |
| 23 | 8 | 2 | 426 | Xavier Nairne |  JAM | 21.64 | +0.4 | |
| 24 | 8 | 3 | 290 | Paul Tritenne |  FRA | 21.72 | -0.3 | 
ms - Milliseconds - shown when two or more competitors finish with the same time down to hundredths of a second